Medical summer programs for rising seniors?

<p>I'm interested in a career in medicine, and I would really like to participate in some kind of program during the summer of 2014. I was hoping to find a competitive program that would look good for college applications and be free. I have a 4.0 unweighted cumulative GPA (4.3 weighted) and am taking AP biology this year. I have good extra-curriculars and am also planning on volunteering at my local hospital this school year, so I think I might be able to get into a competitive program. Any suggestions?</p>